Description of problem:

Issues when using Host Collection membership Management, the number of content hosts is not accurate

How reproducible:

100%

Is this issue a regression from an earlier version:

Steps to Reproduce:

1. Install Satellite

2. Setup host collection

3. Click on Host Collection membership management

4. Click on "Remove From"

Actual behavior:
We can see the message "... remove the X content host(s) selected ...", where the X is always 1

Expected behavior:
Instead of setting the number 1, that would be a variable that matches the number of Content hosts, as presented in the field below, on the same screen.

Business Impact / Additional info:

You can see this behavior in the video below

https://youtu.be/rRwJVzJEdKQ?t=1024

QE Tracker for https://issues.redhat.com/browse/SAT-28293